Write and read back binary data : BinaryWriter « File Directory Stream « C# / CSharp Tutorial

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C# / CSharp Tutorial » File Directory Stream » BinaryWriter 
15.27.2.Write and read back binary data
using System; 
using System.IO;  
 
class MainClass 
  public static void Main() { 
    BinaryWriter dataOut; 
    BinaryReader dataIn; 
 
    int i = 10
    double d = 1.56
    bool b = true
 
    try 
      dataOut = new BinaryWriter(new FileStream("testdata", FileMode.Create))
    
    catch(IOException exc) { 
      Console.WriteLine(exc.Message + "\nCannot open file.")
      return
    
 
    try 
      Console.WriteLine("Writing " + i)
      dataOut.Write(i);  
 
      Console.WriteLine("Writing " + d)
      dataOut.Write(d)
 
      Console.WriteLine("Writing " + b)
      dataOut.Write(b)
 
      Console.WriteLine("Writing " 12.2 7.4)
      dataOut.Write(12.2 7.4)
 
    
    catch(IOException exc) { 
      Console.WriteLine(exc.Message + "\nWrite error.")
    
 
    dataOut.Close()
 
    Console.WriteLine()
 
    try 
      dataIn = new BinaryReader(new FileStream("testdata", FileMode.Open))
    
    catch(FileNotFoundException exc) { 
      Console.WriteLine(exc.Message + "\nCannot open file.")
      return
    
 
    try 
      i = dataIn.ReadInt32()
      Console.WriteLine("Reading " + i)
 
      d = dataIn.ReadDouble()
      Console.WriteLine("Reading " + d)
 
      b = dataIn.ReadBoolean()
      Console.WriteLine("Reading " + b)
 
      d = dataIn.ReadDouble()
      Console.WriteLine("Reading " + d)
    
    catch(IOException exc) { 
      Console.WriteLine(exc.Message + "Read error.")
    
 
    dataIn.Close();  
  
}
Writing 10
Writing 1.56
Writing True
Writing 90.28

Reading 10
Reading 1.56
Reading True
Reading 90.28
15.27.BinaryWriter
15.27.1.Commonly Used Output Methods Defined by BinaryWriter
15.27.2.Write and read back binary data
15.27.3.Write decimal, strings and char to a file using the BinaryWriter
15.27.4.Move internal position for a BinaryWriter
15.27.5.Write/Read int, float, char array and bool to a binary file using BinaryWriter
15.27.6.Use BinaryWriter to save data in binary format
15.27.7.Binary Writer Reader
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